Fill the gaps on minerals

Exercise and reference answers

Missing parts

1. Answer

   70

   Choices

   1. 70
   2. 50
   3. 90

2. Answer

   50-60

   Choices

   1. 50-60
   2. 20-30
   3. 80-90

3. Answer

   1700

   Choices

   1. 1700
   2. 700
   3. 170

4. Answer

   200

   Choices

   1. 200
   2. 500
   3. 55

Complete the statement

Magnetite holds up to {0} per cent iron. Hematite holds {1} per cent. The gas pipeline runs {2} km. Gondwana coal is over {3} million years old.

Instructions

Tap a word to drop it into the empty slot.

Explanation